This report summarizes all water quality data collected
at Site DOR-60, Dorrance Creek in the Portage River at Gage #04097200 Basin of the Portage River Sub-Watershed, which is part of the larger
St. Joseph River Watershed. (see map to the right)

Water sampling and measurements are conducted by Environmental
Health Bureau staff.

Portage River at Gage #04097200 (State of Michigan Basin ID #: 34 47)

Dorrance Creek

DOR-60

East side of South 34th Street, immediately south of East 'TS' Avenue

Pavilion Township (36)

Site Code: DOR-60, Dorrance Creek

Sample

Sample

E. coli Bacteria

Water Temperature

Dissolved Oxygen

pH

Conductivity

TDS

Turbidity

Date

Time

(MPN)

(degrees F)

mg/L

% Saturation

(units)

(mS / cm)

(g / L)

(NTU)

10/15/2009

12:10

224.7

40.8

14.8

115.8%

8.73

0.627

0.4

3.7

06/30/2009

13:00

277.8

60.0

9.3

93.8%

8.54

0.552

0.4

11.5

06/02/2009

10:40

816.4

52.6

10.9

100.4%

8.40

0.577

0.4

10.5

05/07/2009

13:05

83.9

50.7

13.4

120.0%

8.61

0.569

0.4

3.3

04/08/2009

12:35

18.5

40.8

7.4

57.5%

8.28

0.448

0.3

7.0

03/05/2009

10:50

131.4

38.2

10.1

76.0%

8.32

0.556

0.4

6.9

12/29/2008

09:50

488.4

35.0

14.8

105.9%

8.15

0.477

0.3

10.8

10/29/2008

08:20

107.6

42.8

12.1

97.5%

8.00

0.606

0.4

4.0

09/04/2008

08:30

2,419.6

64.3

8.3

87.7%

8.16

0.565

0.4

8.3

07/09/2008

08:50

1,299.7

62.3

8.6

88.0%

8.22

0.566

0.4

13.7

04/01/2008

10:30

1,119.9

46.4

9.8

82.4%

7.86

0.363

0.2

30.9

03/04/2008

10:23

378.4

34.3

14.1

99.9%

8.02

0.427

0.3

8.0

02/05/2008

10:36

435.2

39.6

12.6

96.0%

8.11

0.550

0.4

10.7

01/07/2008

10:10

816.4

42.4

11.7

93.4%

7.98

0.428

0.3

20.1

11/28/2007

09:55

172.3

34.9

N/A

N/A

8.21

0.655

0.4

3.5

08/29/2007

11:15

261.3

65.3

8.3

88.7%

8.17

0.645

0.4

4.5

07/12/2007

09:45

2,419.6

61.6

8.7

89.2%

8.17

0.578

0.4

10.1

05/29/2007

11:55

1,986.3

59.3

10.6

105.5%

7.97

0.597

0.4

6.4

04/24/2007

12:50

87.8

55.0

11.4

107.7%

8.57

0.590

0.4

2.4

01/11/2007

11:30

101.4

37.6

12.6

93.8%

8.34

0.622

0.4

3.3

10/17/2006

12:00

2,419.6

50.3

9.2

82.2%

7.90

0.501

0.3

N/A

09/07/2006

10:57

290.9

59.0

9.6

95.1%

8.21

0.586

0.4

3.1

06/22/2006

11:45

2,419.6

63.7

8.8

92.6%

8.05

0.516

0.3

N/A

04/18/2006

10:40

60.5

50.6

4.9

45.3%

8.77

0.630

0.4

6.0

02/22/2006

12:35

42.6

37.1

9.3

70.9%

8.40

0.663

0.4

10.5

10/26/2005

13:15

90.6

44.0

11.0

92.4%

8.23

0.613

0.4

2.6

09/08/2005

10:38

1,299.7

63.6

9.1

96.7%

8.15

0.579

0.4

4.9

07/13/2005

10:25

2,419.6

66.5

7.6

84.2%

7.88

0.510

0.3

22.7

05/05/2005

11:30

74.8

48.9

12.0

107.7%

7.99

0.606

0.4

6.9

03/31/2005

13:55

98.7

N/A

N/A

N/A

N/A

N/A

N/A

N/A

03/11/2005

12:44

30.5

37.2

12.1

92.2%

7.92

0.607

0.4

7.7

10/19/2004

12:25

248.9

47.3

9.8

85.4%

8.15

0.592

0.4

6.4

08/13/2004

14:40

224.7

59.2

9.3

95.1%

8.19

0.557

0.4

4.8

07/09/2004

11:25

225.4

59.3

9.3

94.8%

8.01

0.573

0.4

9.7

06/03/2004

11:00

344.8

55.3

9.3

90.6%

7.99

0.574

0.4

15.9

05/13/2004

10:55

980.4

59.8

8.2

84.9%

7.85

0.544

0.4

21.3

04/28/2004

10:06

93.3

45.2

11.6

99.6%

8.23

0.581

0.4

5.3

04/07/2004

11:05

110.0

43.3

11.2

93.1%

8.23

0.585

0.4

5.9

03/17/2004

11:10

14.5

36.6

11.7

89.1%

8.13

0.587

0.4

8.3

02/25/2004

10:22

435.2

32.5

11.3

80.8%

8.11

0.573

0.4

12.5

02/04/2004

14:55

27.5

31.6

12.0

84.4%

8.05

0.610

0.4

11.9

02/27/2003

14:35

21.6

31.9

16.3

115.6%

8.92

0.642

0.4

N/A

SummaryStatistics

Count

42

41

40

40

41

41

41

38

Average

610.0

48.5

10.6

91.8%

8.20

0.567

0.4

9.1

Minumum

14.5

31.6

4.9

45.3%

7.85

0.363

0.2

2.4

Maximum

2,419.6

66.5

16.3

120.0%

8.92

0.663

0.4

30.9

Above represents the summary statistics of ambient water quality conditions and below is a summary of E. coli bacteria results for DOR-60 (Dorrance Creek) between February 2003 and October 2009. This site is located in Section Number 36 of Pavilion Township, East side of South 34th Street, immediately south of East 'TS' Avenue.

17 out of 42 water sample results exceeded 300 bacteria colonies per 100 ml of water.

9 out of 42 water sample results were between 130 and 299 bacteria colonies per 100 ml of water.

16 out of 42 water sample results were less than 130 bacteria colonies per 100 ml of water.